I am looking to find a contact who may be able to help me out with the 1940/41 Neptune 10A/16 / 11A/16 series twin cylinder engines. I have one of these which I wish to restore and hope to be able to find a good resource for information on these engines.
Sorry to say ,but Doug Penn retired.
He was real a real good guy to deal with.
Here's a link to the web site of the guy that bought
Doug's Neptune stock. https://www.neptuneoutboardmotors.com/
Good Luck with your motor.